title: Haematological effects from radioiodine treatment of thyroid carcinoma.
abstract: The changes in peripheral blood counts and number of colony forming cells (CFU-c) in the bone marrow after 131I treatment for thyroid cancer were followed in 24 patients. The median WBC declined to 78% and the median blood platelet count to 69% of the pretreatment values after 4 treatments. In 4 patients a moderate pancytopenia developed and in 1 patient additionally treated with chemotherapy and preleukaemia was suspected. In 19 bone marrow samples obtained from 13 patients no difference in number of CFU-c could be found related to cumulated 131I activities given to those patients. In 5 of 7 patients examined between the 9th and the 19th day afer a treatment the number of CFU-c had declined by 50% or more. It is concluded that radioiodine exerts a protracted suppressive effect on the bone marrow which is seldom severe. Agar culture of bone marrow cells with counting of CFU-c was not found to be more sensitive than the peripheral blood counts in predicting bone marrow damage and cannot be recommended for routine use.
authors.affiliation: Department of Oncology, Finsen Institute/Rigshospitalet, Copenhagen, Denmark.
authors.forename: N
authors.initials: N
authors.lastname: Keldsen
authors.forename: B T
authors.initials: BT
authors.lastname: Mortensen
authors.forename: H S
authors.initials: HS
authors.lastname: Hansen
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001772:Blood Cell Count / Q000528:radiation effects; D001853:Bone Marrow / Q000528:radiation effects*; D005260:Female; D006412:Hematopoietic Stem Cells / Q000187:drug effects; D006801:Humans; D007457:Iodine Radioisotopes / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D011879:Radiotherapy Dosage; D013964:Thyroid Neoplasms / Q000097:blood* / Q000532:radiotherapy*
chemical_list: D007457:Iodine Radioisotopes